Feeding preference of Pentalonia nigronervosa Coq. (Hemiptera: Aphididae) for and its comparative development on bunchy-top susceptible abaca variety and resistant hybrids

Issue Date

10-1998

Abstract

Tests conducted in the greenhouse showed that the banana aphid, Pentalonia nigronervosa Coq. (Hemiptera: Aphididae), the only known vector of the abaca bunchy-top (ABT) virus, preferred to feed on the ABT-susceptible variety, Tinauagan Pula (TP) than on the resistant hybrids, Itolaus x Magsarapong 7 and Pacol x CES 3-2. Their preference was already manifested during the very first monitoring schedule (0.5 hr), although the number of colonizing aphids on TP only became statistically greater than those on the two resistant hybrids at 4 hours.

P. nigronervosa exhibited better development and reproduction on TP, as manifested by its shorter nymphal development period, lower number of nymphal instars, longer reproductive period and higher fecundity, than on the resistant hybrids.

In a field experiment, P. nigronervosa colony establishment was more successful on TP than on the resistant hybrids. The resistance of the hybrids to the aphid vector may explain partly their resistance to the disease

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

12

Issue

2

Page

169-177

Document Type

Article

Frequency

semi-annually

Physical Description

tables; graphs

Language

English

En – AGROVOC descriptors

PENTALONIA NIGRONERVOSA; HEMIPTERA; APHIDIDAE; BANANA BUNCHY TOP; ABACA; HOST PLANT RESISTANCE; ANTIBIOSIS; DEFENCE MECHANISM; FEEDING PREFERENCES; TRANSMISSION; VECTORS

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